
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGraphics.h"
#include "SkRandom.h"
#include "SkLayerDrawLooper.h"
#include "SkBlurMaskFilter.h"

#define WIDTH   200
#define HEIGHT  200

class LooperView : public SampleView
    {
    public:

        SkLayerDrawLooper*   fLooper;

        LooperView()
            {
            static const struct
                {
                SkColor         fColor;
                SkPaint::Style  fStyle;
                SkScalar        fWidth;
                SkScalar        fOffset;
                int             fBlur;
                } gParams[] =
                {
                    { SK_ColorWHITE, SkPaint::kStroke_Style, SkIntToScalar(1)*3/4, 0, 0 },
                    { SK_ColorRED, SkPaint::kStroke_Style, SkIntToScalar(4), 0, 0 },
                    { SK_ColorBLUE, SkPaint::kFill_Style, 0, 0, 0 },
                    { 0x88000000, SkPaint::kFill_Style, 0, SkIntToScalar(10), 3 }
                };

            fLooper = new SkLayerDrawLooper;

            SkLayerDrawLooper::LayerInfo info;
            info.fFlagsMask = SkPaint::kAntiAlias_Flag;
            info.fPaintBits = SkLayerDrawLooper::kStyle_Bit | SkLayerDrawLooper::kMaskFilter_Bit;
            info.fColorMode = SkXfermode::kSrc_Mode;

            for (size_t i = 0; i < SK_ARRAY_COUNT(gParams); i++)
                {
                info.fOffset.set(gParams[i].fOffset, gParams[i].fOffset);
                SkPaint* paint = fLooper->addLayer(info);
                paint->setAntiAlias(true);
                paint->setColor(gParams[i].fColor);
                paint->setStyle(gParams[i].fStyle);
                paint->setStrokeWidth(gParams[i].fWidth);
                if (gParams[i].fBlur > 0)
                    {
                    SkMaskFilter* mf = SkBlurMaskFilter::Create(SkIntToScalar(gParams[i].fBlur),
                                       SkBlurMaskFilter::kNormal_BlurStyle);
                    paint->setMaskFilter(mf)->unref();
                    }
                }

            this->setBGColor(0xFFDDDDDD);
            }

        virtual ~LooperView()
            {
            SkSafeUnref(fLooper);
            }

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "DrawLooper");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
            SkPaint  paint;
            paint.setTextSize(SkIntToScalar(72));
            paint.setLooper(fLooper);

            canvas->drawCircle(SkIntToScalar(50), SkIntToScalar(50),
                               SkIntToScalar(30), paint);

            canvas->drawRectCoords(SkIntToScalar(150), SkIntToScalar(50),
                                   SkIntToScalar(200), SkIntToScalar(100), paint);

            canvas->drawText("Looper", 6, SkIntToScalar(230), SkIntToScalar(100),
                             paint);
            }

    private:
        typedef SampleView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new LooperView;
    }
static SkViewRegister reg(MyFactory);

